Six Advantage: 1. Compulsive recycling means help the system collector absorb the sun energy and transfers it to water tank efficiently 2. High working efficiency: With the scientific principle, the heat energy can be transferred to water tank on time 3. Saving energy: Choosing Germany original pump, the electricity consumption is very litter, just only several cents every day 4. One pump, two functions: Increasing pressure and recycling 5. Operation easily with an intelligent controller and digital display 6. Beautiful appearance and easy to be installed